Elongated

伸长
  • 文章类型: Journal Article
    目的:茎突(SP)在细长的SP(ESP)和/或钙化增加的意义上表现出增大(>30mm),从而导致鹰综合征(ES),从而具有临床相关性。全景图(PR)或计算机断层扫描(CT)是ES常规诊断的一部分。目前,CT被认为是金标准。这项研究的目的是在PR和CT之间的比较研究中调查SP/ESP的诊断/测量的准确性。此外,除了测量既定的参数,本研究旨在确定SP底部和尖端的当前未检查宽度。
    方法:本研究检查了在同一天接受PR和CT的100例患者的双侧SP的放射学发现。在基底和尖端处进行SP的长度和宽度的测量。此外,钙化模式,分析Langlais分类和ESP的患病率。
    结果:对于每个参数,PR和CT测量SP之间存在高度显著的相关性。在18-75岁的年龄组中,男性的SP明显长于女性。SP的长度测量结果(男性:右侧SP=32.98mm;左侧SP=35.21mm;女性:右侧SP=30.31mm;左侧SP=30.92mm)显着超过了可比研究的值。
    结论:因此,可以得出结论,与CT相比,PR提供了准确的测量结果,用于测量和诊断SP/ESP/Eagle综合征。这项研究是第一个检查底部和尖端的SP宽度的研究之一,因此,这些测量值可以作为进一步研究的基线.由于本研究中SP的平均长度超过30.0毫米,这些发现提出了一个问题,即30.0mm的截距是否足以诊断ESP.
    OBJECTIVE: The styloid process (SP) becomes clinically relevant when it shows enlargement (>30 mm) in the sense of an elongated SP (ESP) and/or increasing calcification leading to Eagle Syndrome (ES). Panoramic radiograph (PR) or computed tomography (CT) are part of the routine diagnostics in ES. Currently, CT is considered the gold standard. The aim of this study was to investigate the accuracy in the diagnostics/measurements of SP/ESP throughout a comparative study between PR and CT. Furthermore, in addition to measuring established parameters, this study aimed to determine the currently unexamined width in the base and tip of the SP.
    METHODS: The present study examined the radiological findings of bilateral SP in 100 patients who received both PR and CT on the same day. Measurements of the length of the SP and width at the basis and tip were performed. Furthermore, calcification patterns, Langlais classification and the prevalence of ESP were analyzed.
    RESULTS: There was a highly significant correlation between PR and CT measuring SP for every parameter. Males showed significantly longer SP than females among the age group between 18-75 years. The results of the length measurements of the SP (male: right SP=32.98 mm; left SP=35.21 mm; female: right SP=30.31 mm; left SP=30.92 mm) significantly exceeded the values of comparable studies.
    CONCLUSIONS: Consequently, it can be concluded that PR provides accurate measurements when compared to CT for measuring and diagnosing SP/ESP/Eagle syndrome. This study was one of the first to examine the width of the SP in the base and tip, thus these measurements can serve as a baseline for further studies. Since the mean lengths of SP exceeded 30.0 mm in the present study, these findings raise the question of whether the cut-off of 30.0 mm is adequate for the diagnosis of ESP.
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  • 文章类型: Journal Article
    本文讨论了用于生物传感器应用的细长椭圆体液晶微滴重取向动力学。为了研究细长液滴对向列液晶液滴生物传感器的影响,我们使用椭圆几何形状模拟了液晶滴的模型。相对于细长的液滴形状检查导向器的重新定向。此外,我们研究了纵横比作为影响生物传感器响应时间的因素,与表面粘度和锚定能有关。最后,研究结果表明,在设计生物传感器时应考虑纵横比。这些结果可用于开发用于各种应用的更有效的生物传感器。这个模型然后预测导演重新定向的角度,这取决于锚定能和表面粘度。该模型进一步表明,当涉及指向矢重新定向角度时,表面粘度和垂直锚定能都起着重要作用。我们根据Leslie-Ericksen连续理论,利用扭矩平衡和Frank自由能开发并应用了非线性非稳态数学模型,用于模拟具有水界面的细长向列型液晶生物传感器液滴。利用欧拉-拉格朗日方程,当表面活性剂分子添加到界面时,通过改变易磁化轴对瞬态液晶-水界面重新对准进行建模。假设液滴表面的重新排列是由表面活性剂的作用驱动的,这导致了锚定过渡。根据结果,生物传感器的响应时间取决于纵横比。因此,伸长具有控制生物传感响应时间的潜力。通过本文提出的数值结果,我们的研究结果为生物传感应用中细长液晶液滴中的指向矢重新取向提供了更好的理解。
    Elongated ellipsoidal liquid crystal microdroplet reorientation dynamics are discussed in this paper for biosensor applications. To investigate the effect of elongated droplets on nematic liquid crystal droplet biosensors, we simulated a model of a liquid crystal droplet using ellipse geometry. Director reorientation is examined in relation to the elongated droplet shape. In addition, we examined aspect ratio as a factor affecting biosensor response time in relation to surface viscosity and anchoring energy. Finally, the findings suggest that the aspect ratio should be taken into account when designing biosensors. These results can be used to develop more effective biosensors for a variety of applications. This model then predicts the director reorientation angle, which is dependent on the anchoring energy and surface viscosity. This model further suggests that both surface viscosity and homeotropic anchoring energy play an important role when it comes to the director reorientation angle. We developed and applied a nonlinear unsteady-state mathematical model utilizing torque balance and Frank free energy according to the Leslie-Ericksen continuum theory for simulating elongated nematic liquid crystal biosensor droplets with aqueous interfaces. Using the Euler-Lagrange equation, a transient liquid crystal-aqueous interface realignment is modeled by changing the easy axis when surfactant molecules are added to the interface. The realignment at the surface of the droplet is assumed to be driven by the effect of the surfactant, which causes an anchoring transition. According to the results, the response time of the biosensor depends on the aspect ratio. Therefore, the elongation has the potential to control biosensing response time. The result of our study provides a better understanding of director reorientation in elongated liquid crystal droplets in biosensing applications through the numerical results which are presented in this paper.
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  • 文章类型: Journal Article
    To evaluate modified anterior elongated corneal incisions as a simple technique to reduce the incidence and severity of intraoperative floppy iris syndrome (IFIS), in patients taking tamsulosin (a selective α1a-adrenergic receptor antagonist).
    This prospective case series was conducted at Meir Medical Center, a tertiary care facility in Israel. Included were 45 eyes of 39 male patients taking tamsulosin, and thus prone to IFIS. Patients underwent phacoemulsification cataract surgery with anterior elongated corneal incisions. The primary outcomes were the incidence and severity of IFIS, the complication rate and the need for additional IFIS management techniques. The secondary outcome was to quantify the surgically induced astigmatism, using Alpin\'s vector analysis. The tamsulosin treatment period and pupil diameter during five stages of the surgery were also noted.
    The overall rate of IFIS was 33.33% (n = 15). The IFIS severity was rated as mild in 22.22% and moderate in 11.11% of the study eyes. No IFIS was noted in 66.67% of the eyes. There were no cases of severe IFIS, and no need for other IFIS management strategies. The complications rate was 2.22% (n = 1). Patients who developed IFIS had a significantly smaller pupil at the beginning of surgery (p < 0.05). There was no significant difference in tamsulosin treatment period between patients with and without IFIS (p = 0.19). The centroid - the mean SIA vector was 0.51 D @ 18° ±1.5 D (SD).
    In tamsulosin treated patients, using modified corneal incisions may be feasible in order to reduce the incidence and severity of IFIS during cataract surgery. Future randomized studies are warranted.
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  • 文章类型: Journal Article
    OBJECTIVE: To investigate the association of microcystic, elongated, and fragmented (MELF) pattern of invasion with prognostic factors in endometrioid endometrial adenocarcinoma (EEA).
    METHODS: Stained tissue sections from 83 cases of EEA operated by the same gynecologic oncologist were reviewed to identify cases showing MELF-type invasion in this retrospective study. The association of MELF pattern with age, tumor grade, depth of myometrial invasion, and presence of lymphovascular space invasion (LVSI) was analyzed.
    RESULTS: FIGO grade 2 and grade 1 tumors were evident in 53.0% and 38.6% of patients, respectively. Depth of myometrial invasion was <50% in 72.0% of patients, and LVSI was absent in 77.1%. MELF pattern was confirmed in 35 (42.2%) patients. Presence of MELF pattern was associated with significantly higher mean ± standard deviation age (62.9±6.9) years vs. 58.9±9.1 years, p=0.033), and found to be more likely in patients with high-grade tumor (FIGO grade III; 85.7% vs. 14.3%, p<0.001), deep (≥50%) myometrial invasion (78.3% vs. 21.7%, p<0.001), and presence of LVSI (94.7% vs. 5.3%, p<0.001) as compared with absence of MELF pattern.
    CONCLUSIONS: In conclusion, our findings revealed a high rate of MELF pattern among patients with EEA alongside the association of MELF pattern with poor prognostic factors such as high grade tumor, deep myometrial invasion, and LVSI.
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  • 文章类型: Journal Article
    OBJECTIVE: The styloid process (SP) is a bony projection, located just anterior to the stylomastoid foramen, the normal length of which is approximately 20-30 mm. The length of SP when exceeds 30 mm it is said to \"elongated.\" The purpose of this retrospective study was to assess the prevalence of elongated SP (ESP) by cone beam computed tomography (CBCT) examination in Turkish subpopulation and its relation to gender and age.
    METHODS: This study analyzed CBCT of 1000 patients who were randomly selected to participate and were aged from 14 to 78 years. Any radiograph with questionable SP was excluded from the study. The apparent length and thickness of the SP were measured by two dental and maxillofacial radiologists. The ESP was classified with radiographic appearance-based morphology of elongation. The data were analyzed with the IBM SPSS Statistics 20.0.
    RESULTS: The mean age of patients was 42.49 ± 14.83 years. The length of SP was measured over 30 mm in 151 patients (15.1%). A total of 151 CBCT showed ESP, of which 87 (57.6%) were noticed in males and 64 (42.4%) in female patients. The length of right-sided SP ranged from 30.05 to 85.49 mm and left-sided SP from 30.14 to 83.72 mm.
    CONCLUSIONS: CBCT is a valuable diagnostic imaging tool which makes accurate length measurements. It is important for the clinicians to be aware of natural variations of the SP whose clinical importance is not well understood.
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  • 文章类型: Journal Article
    Flame-deposited semiconducting nanomaterials on microelectronic circuitry exhibit exceptional performance as chemoresistive gas sensors. Current manufacturing technology, however, does not monitor in situ the formation of such nanostructured films, even though this can facilitate the controlled and economic synthesis of these sensors. Here, the resistance of such growing films is measured in situ during fabrication to monitor the creation of a semiconducting nanoparticle network for gas sensors. Upon formation of that network, the film resistance drops drastically to an asymptotic value that depends largely on the film structure or morphology rather than on its thickness and size of nanoparticle building blocks. Precursor solutions of various concentrations enable the flame deposition of Sb-doped SnO2 sensing films of different morphologies, each of which exhibit a characteristic in situ resistance pattern. Low precursor concentrations (1 mM) lead to thin (ca. 0.16 μm) films with slender columnar structures of increasing diameter (up to 25 nm) after prolonged deposition (up to 6 min) and show an oscillating in situ resistance during their fabrication. On the other extreme, high precursor concentrations (100 mM) lead to thick (up to 80 μm) dendritic and porous films consisting of nanoparticles with relatively small primary particle diameter (around 7 nm) that remain invariant of deposition duration, which is in agreement with the stable in situ resistance. Such dendritic films exhibit a sensor recovery time that is an order of magnitude longer than that of those made at lower concentrations. The above understanding enables the rapid and economic flame synthesis of thin gas sensors consisting of minimal semiconducting nanomaterial mass possessing a tuned baseline resistance and exhibiting excellent response to ethanol vapor.
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  • 文章类型: Journal Article
    BACKGROUND: We aimed to report a simple technique that involves modified anterior (to the limbus) elongated corneal incisions in order to reduce the incidence and severity of intraoperative floppy iris syndrome (IFIS) and related complications.
    METHODS: This was a retrospective study of phacoemulsification cataract surgeries performed by a single surgeon on patients receiving tamsulosin or alfuzosin between 1 January 2009 and 31 July 2012 at Meir Medical Center, Kfar-Sava, Israel. We recorded preoperative gender, age, α-antagonist medication, coexisting pseudoexfoliation (PXF), and intraoperative use of ophthalmic viscosurgical devices (OVDs), pupil size, complications, IFIS grading and the need for additional operative strategies to manage IFIS. Elongated corneal incisions were performed approximately 1 mm anterior to the limbus.
    RESULTS: Ninety-three eyes of 81 men were included. Mean age was 76.5 years (range 55 to 96 years). Forty-seven eyes (40 patients) had documented use of alfuzosin and 45 eyes (40 patients) of tamsulosin. One patient received both. The overall rate of IFIS was 22.6 % (n = 21). Eyes of patients who were treated with alfuzosin had a milder grading (p < 0.001) and an overall lower percentage of IFIS compared to tamsulosin (4.26 % versus 42.22 % respectively, p < 0.001). No additional strategies were used to manage IFIS during surgery. No intraoperative complications occurred.
    CONCLUSIONS: Anterior elongated incisions are simple and efficient in preventing IFIS, exempting the surgeon from the use of additional expensive devices or materials in most cases. They do not limit the surgeon to one strategy, and therefore, if necessary, another may be applied at any given time.
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